JPS58171771A - Floppy disc cassette - Google Patents

Abstract

PURPOSE:To prevent a cassette from springing out to the outside of a magnetic recording and reproducing device, by providing a notch part, where an engaging part is formed on the side face opposite to the direction of shutter energizing, at the front edge of a shutter. CONSTITUTION:When a cassette C is inserted to an insertion entrance of a cassette holder H, a pin P is put into a notch part 17 of a shutter 15. When the cassette C is pressed in this state, the pin P is pressed to rotate a turning lever R counterclockwise around a caulking pin A1 while expanding a spring SP1, and the pin P is struck against a slope 17a of the shutter 15 and moves the shutter right while expanding a spring 18. Just before the end of this course, the pin P drops to a step part 13 of a cassette shell 11 and is in the state shown in figure by two-dot chain line.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floppy disk cassette in which a shutter is automatically moved to open and close a window during the process of attachment and detachment to a magnetic recording/reproducing device.

Figures 1(a) and 1(b) show a mechanism for automatically opening and closing the window of a conventional floppy disk cassette (hereinafter simply referred to as cassette) by moving the shutter during the process of loading and unloading it into a magnetic recording/reproducing device. Shown in (c) and (d).

In FIG. 1, 1 is a cassette shell, and a window 2 communicating with the front and back sides is provided. 3 is a floppy disk housed in the cassette shell IK; 4 is the cassette shell 1;
The shutter is slidably provided in the window, and has an opening 5 that overlaps the window 2 when moved to the right, and a notch 6 for driving the shutter 4. Reference numeral 1 denotes a spring as a biasing means for biasing the shutter in a direction to always close the window 2, and is stretched between the cassette shell 1 and the shutter 4. With the above, cassette)C is constructed and X, \.

Note that RL is a rotary lever whose one end is rotatably caulked by a caulking pin A of the magnetic recording/reproducing device K (not shown), and the other end is provided with a pin P serving as a drive unit that engages with the shutter 4 of the cassette C. At the same time, the cassette Cv is urged by a spring SP in the direction of ejecting the cassette Cv (clockwise), and abuts against a locking piece S provided on the magnetic recording/reproducing device.

Next, the automatic opening/closing operation and operation '4 of the window of the cassette having such a structure will be explained.

When the cassette CI is inserted into the magnetic recording/reproducing apparatus as shown in FIG. 1(a), the pin P enters the notch 6 of the shutter 4.

When further pressed in the direction of the CV arrow, the pin P is pushed, causing the U-movement bar RL to rotate counterclockwise while extending the spring 7Y around the caulking pin Av.
The line 11 is extended while colliding with the right depression of the notch 6, and the shutter 4 is moved to the right as shown in FIG. 1(b). When the bale is also suppressed by the cassette CY, the shutter 4 moves to the right while expanding the spring 7Y, and the opening 5 of the shutter 4 and the window 2 of the cassette shell 1 overlap,
The floppy disk 30 is in the state shown in FIG. 1(c).

After being mounted (set) in the drive mechanism in the state shown in FIG. 1(c), the floppy disk 3 is driven to perform recording or reproduction.

Ejection from the CV magnetic recording/reproducing device
In this case, the cassette C can be ejected from the magnetic recording/reproducing apparatus by pulling out the cassette C and operating an eject button (not shown), and the window 2 is closed by the shutter 4 in a process reverse to that described above.

However, in the method of installing cassette C as described above, the first
If the cassette C is accidentally pulled in the opposite direction to the cassette insertion direction during the insertion of the cassette as shown in FIG.
The shutter 4 moves to the left by the biasing force of the spring 7 and closes the window 2 as shown in FIG. Therefore, there were cases where it was necessary to pull out the cassette (CY) and reinsert it from the beginning.In addition, when the eject mechanism was activated to eject the cassette (CV),
There were cases in which the engagement between the pin P and the notch 6 broke and the cassette C flew out of the magnetic recording/reproducing apparatus due to the biasing force of the spring SP. Furthermore, since the cassette C is always subjected to a driving force in the right direction due to the biasing force of the spring 7 that has expanded during the entire process from insertion to ejection, it is difficult to position the cassette C accurately when installing it in the floppy disk 3v drive mechanism. There were drawbacks such as having an adverse effect on the mounting of the 70T Bee Disk 3.

The present invention has been made in view of the above points, and the shutter, which is biased in the direction of closing the window of the cassette shell, is secured to the side surface of the notch that abuts against the drive section of the magnetic recording/reproducing device. Tomo K.

The cassette shell is also provided with a stepped portion to ensure that the drive unit and shutter collide with each other during the process of attaching and detaching the cassette to the V magnetic recording and reproducing device, and to remove the biasing force on the shutter when attaching it to the drive mechanism. This is what we provide. The present invention will be explained below based on the drawings.

FIG. 2 is a plan view showing a cassette which is an embodiment of the present invention.

In FIG. 2, reference numeral 11 denotes a cassette shell, which has a window 12 that communicates with the front and back sides, and a stepped portion 13 at the front edge. 14 is a floppy disk housed in the cassette shell 11, and 15 is a floppy disk housed in the cassette shell 11! A shutter provided to be movable by IR, which overlaps the window 12 when moved to the right, has an opening 16, and a notch 1T on the right side having an inclined surface 17a as a retaining portion that opens inward at the front edge end. is the provision.

Reference numeral 18 denotes a spring serving as a biasing means for always biasing the window 12 in the direction of closing the shutter 15, and is stretched between the cassette shell 11 and the shutter 15. The cassette C is configured as described above.

Figures 93 (a), (b), and (c) are explanatory diagrams for automatically opening and closing a window by moving the shutter on a 3m shelf for attaching and detaching cassettes, and mainly show the shutter movement mechanism. be. In FIG. 3(a), H is a cassette holder provided with a locking piece S and a locking piece S for locking the cassette Cv. 6R is an abbreviated rotating lever, and one end of the cassette holder HK is t. Caulk pin ^.

It is rotatably caulked at the cassette holder H, and is biased clockwise by a spring SP1 stretched between the cassette holder H and a locking piece S at the other end.

The locking pieces S and Kli of the cassette holder H are provided with a matching portion II. L is a lever whose center portion is rotatably caulked to the other end of the rotary lever R with a caulking pin A, and one end thereof protrudes toward the back surface 11 in FIG. 3(a), the operation of which will be explained later. A pin P as a driving part is implanted to engage with the gloss 15 of the cassette C inserted in the cassette C, and a balancing part 1 which abuts against the locking piece S3 of the rotating lever R is installed at the other end. is provided, and a spring SP is stretched between the rotating lever R and the rotating lever R.

is biased counterclockwise. In addition, the spring SP
, , SP are all used with weak tensile force,
Taking into consideration the spring 16 of the cassette C, the tension is set in the relationship: spring 18>spring SP.

Next, in Figures 2 and 3, operate the automatic opening/closing of the window.

Explain how it works.

As shown in FIG. 3 (1) K solid line, when the cassette holder HK (cassette) C is not inserted, the enclosing lever R is moved by the spring SPl to the engagement part II of the locking piece SIK of the cassette holder H, and the lever L is a spring SP, which connects the locking piece s3 of the rotating lever R to the balancing portion 1. are colliding with each other. In this state, when the cassette C4 is inserted into the insertion slot of the cassette holder H, the pin P enters the notch 17 of the shutter 15 (Fig. 3(a)
A solid line of I! 1).

When the cassette C11 is pressed from this state, the pin P is pressed, and the rotating lever R rotates counterclockwise around the caulking pin A while extending the spring SP.
The pin P collides with the inclined surface 1Ta of the shutter 15 and moves the gloss 15 to the right while expanding the spring 18Y. Then, near the end of this process, the pin P
falls into the step 13 of the cassette shell 110, as shown in Fig. 3 (
The state shown in a) is shown by the two-dot chain line. When the cassette c is further pressed, the bin P moves to the stepped portion 13 at the farthest point horizontally from the caulking bin^1, as shown by the solid line in FIG. 3(b).
The user moves the shutter 15 to the rightmost side while moving to the right. The idle pin P moves to the left inside the step 81S by the shutter 15 biased by the spring 18, and the step 1
The third
The state is shown by the two-dot chain line in Figure (b). In this state,
Since the bottle P is held between the stepped portion 13 provided in the cassette shell 11 and the cutout portion 1T of the shutter 15, the spring 11
The urging force of t is applied to the pin PK via the shutter 15.
This can be prevented, and the influence of the biasing force of the spring 18 when the cassette C is attached to a drive mechanism (not shown) can be eliminated. From this point, if the cassette) CY is suppressed, the bin P cannot move to the left, so the caulking bin ^,
The lever L rotates clockwise around V while extending the spring SP, and the tip of the cassette C engages with the locking piece S of the cassette holder H. When the state 11 is reached, a cassette loading mechanism (not shown) is activated, and the cassette C is loaded into the drive mechanism in the state shown in FIG. 3(C) with the floppy disk 14'Yjll taken out. Note that when the disk 14 is driven in the mounted state, the pads and magnetic heads (not shown) are also pressed and clamped from the front and back sides, making it possible to record or reproduce data signals.

After that, when you want to eject the cassette C, operate the eject button (not shown) and the loading mechanism will open.

The ejecting mechanism operates and ejects the cassette c in a stroke opposite to the loading stroke.

As mentioned above, when the cassette (cassette) C is in the magnetic recording/reproducing apparatus, the inclined surface 17a is formed in the notch IT of the shutter 15, so the bin P and the inclined surface IT1 are kept in contact with each other by the biasing force of the spring 18 from beginning to end. , the engagement never comes loose. Also,
At the end of the ejection stroke of the cassette (cassette) C, the state shown by the two-dot chain line in FIG. Since the cassette P is clamped, the spring SP can prevent the cassette C from jumping out of the magnetic recording sickle reproducing device.

In the above embodiment, the retaining portion of the shutter 5 is formed into an inclined surface 17m, but it goes without saying that the shape is not limited to this and may be any shape that can hold the pin P.

As explained above, since the floppy disk cassette of the present invention is provided with an engaging portion on the abutting surface of the notch of the shutter that abuts against the pin, it is possible to avoid errors when inserting the 7p disk cassette into the magnetic recording/reproducing device. Even if there is, the engagement between the pin and the notch becomes difficult to disengage. Therefore, when a floppy disk is inserted into the magnetic recording/reproducing device, the shutter can be moved to open the window without fail. Furthermore, there are also advantages in that the floppy disk cassette does not fly out of the magnetic recording/reproducing apparatus during the process of ejecting the floppy disk cassette.

Furthermore, in addition to the above-mentioned advantages, the 7P disc cassette of the present invention has an engaging part on the bond surface of the notch of the shutter that abuts the pin, and also has a stepped part on the cassette shell. The biasing force in the direction can be canceled by pinching the pin by the collision between the stepped portion of the cassette shell and the notch of the shutter. Therefore, there is an advantage that the influence of the spring can be removed when or after the floppy disk cassette is installed in the drive.

[Brief explanation of drawings]

Figures 1 (a), (b), and (c) are explanatory diagrams of a conventional 7P disc cassette and a window that opens and closes by automatically moving the shutter, and Figure 2 is an embodiment of the present invention. Plan views showing examples, FIGS. 3(a) and 3(b). (C) is an explanatory diagram when the window is opened and closed by automatically moving the shutter during the process of attaching and detaching the floppy disk cassette shown in FIG. 2. In the figure, 11 is a cassette shell, 12 is a window, 13 is a step,
14 is a floppy disk, 15 is a shutter, 16 is an opening, 17 is a notch, 17a is an inclined surface, 18 is a spring, and C is a cassette. Figure 1 (1) (Figure 1 C) Figure 2 Figure 3 (a) Figure 3 (b) Figure 3 (C) Procedural amendment (formality) May 18, 1980 Director General of the Patent Office 1. Indication of the incident Japanese Patent Application No. 58-200832 2. Name of the invention □ Floppy disk cassette Address 6-7-35, Kitashinyo, Kitashinyo-ku, Tokyo Name (218) Sony Corporation Representative Noriyoshi Ohga 4; Agent: Kobayashi Patent Office, 6th floor, Okunomatsu Building, No. 16, 3 Sakuragaoka-cho, Shibuya-ku, Tokyo 150, Japan Tel: 03 (496) 1256-6, Column 7 for a brief explanation of the drawings in the specification to be amended; On page 12, line 7 of the statement of contents of the amendment, "Fig. 1 (a), (b). (C)" has been replaced with "Fig. 1 (a), (b). (c), ( d) Correct as J.

Claims (2)

[Claims] (1) In a floppy disk cassette provided with a shutter that is biased by a biasing means in a direction to always close a window of a cassette shell containing a floppy disk, the shutter is biased at a front edge of the shutter. A notch with a retaining part formed on the side opposite to the direction in which it is placed v! 7a disc cassette with # characteristics. (2) In a floppy disk cassette provided with a shutter that is biased by a biasing means in a direction that permanently closes a window of a cassette shell containing a floppy disk, the shutter is biased at a front edge of the shutter. A notch with a retaining part formed on the side opposite to the direction in which the window is opened is provided, and the front edge of the cassette shell has a stepped part that overlaps with the notch of the shutter when the shutter moves and the window opens. A floppy disk cassette featuring the following features: